“Don’t be scared of the rematch you little scurrying rat” … McGregor wrote.

Conor dug in, getting personal … posting 2 photos from Khabib’s wedding day — along with the caption, “Your wife is a towel mate” — appearing to make fun of Khabib’s wife’s clothing.

Khabib and his wife are devout Muslims … and his manager, Ali Abdelaziz, took the insult as a direct slight at Khabib’s religion.

“Talking sh*t, this guy is insulting someone’s wife and making fun of her religion and belief. He doesn’t realize he’s insulting 1.5 billon Muslims. Religion and family is a no no. You’re fucked Connor, let’s see what the media is going to say now. He’s a rapist, and a bitch.”

Conor’s used racially and religiously charged rhetoric to sell fights and belittle fighters in the past … so it’s possible this entire incident is an attempt to goad Khabib into a rematch.